串基本操作的演示实现串的赋值，连接，求子串，计算长度等操作-Series basic operation of the demonstration achieve Series assignment, connectivity, in her series, calculating the length of such an operation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001419s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.113094s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001471s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001394s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002994s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000821s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003635s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016355s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001076s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 114334 [ RunTime:0.034561s ]
